MYSQL 4.1以後, 採用了一種新的用戶認證協議, 對於老的客戶端會出現不支持認證協議的錯誤, 以下是官方網站的解決方法?
１Upgrade all client programs to use a 4.1.1 或newer client library.
更新客戶端庫，這需要更新PHP的擴充庫，對於老的api PHP已經不提供了這樣的擴充庫了
２When connecting to the server with a pre-4.1 client program, client program account that still has a pre-4.1-style password.
使用先前建立的帳號連接，對於在新的認證協議下建立的帳戶就不行了
３Reset the password to pre-4.1 style for each user
３Reset the password to pre-4.1 style for each user that ne to use a pre-4.1 client program. This can be done using the SET PASSWORD statement and the OLD_PASSWORD() function: mysql> SET PASSWORD FOR
-> 'some_user'@'some_host' = OLD_PORD); Alternatively, use UPDATE and FLUSH PRIVILEGES: mysql> UPDATE mysql.user SET Password = OLD_PASSWORD('newpwd') -> WHERE Host = 'some_host' AND you want to use for ``newpwd'' in the preceding examples. MySQL cannot tell you what the original password was, so you'll need to pick a new one.
這是一個不錯的辦法，新建立的帳號採用老式的加密協定
４Tell the server to use the older password hashing algorithm:
Start mysqld with the --old-passwords option.
這樣新認證協定的優點就沒法使用了password to each account that has had its password updated to the longer 4.1 format. You can identify these accounts with the following query: mysql> SELECT Host, User, Password FROM mysql.user
。
For each account record displayed by the query, use the Host and User values and assign a password using the OLD_PASSWORD() function and either SET PASSWORD or UPDATE, as described lier .
